Eric Lee / smarc-fsl-linux-kernel

17 Aug, 2016

1 commit

  • 58919e83c   cpufreq / sched: Pass flags to cpufreq_update_util() ... Browse Code »

    It is useful to know the reason why cpufreq_update_util() has just
    been called and that can be passed as flags to cpufreq_update_util()
    and to the ->func() callback in struct update_util_data. However,
    doing that in addition to passing the util and max arguments they
    already take would be clumsy, so avoid it.

    Instead, use the observation that the schedutil governor is part
    of the scheduler proper, so it can access scheduler data directly.
    This allows the util and max arguments of cpufreq_update_util()
    and the ->func() callback in struct update_util_data to be replaced
    with a flags one, but schedutil has to be modified to follow.

    Thus make the schedutil governor obtain the CFS utilization
    information from the scheduler and use the "RT" and "DL" flags
    instead of the special utilization value of ULONG_MAX to track
    updates from the RT and DL sched classes. Make it non-modular
    too to avoid having to export scheduler variables to modules at
    large.

    Next, update all of the other users of cpufreq_update_util()
    and the ->func() callback in struct update_util_data accordingly.

    Suggested-by: Peter Zijlstra
    Signed-off-by: Rafael J. Wysocki
    Acked-by: Peter Zijlstra (Intel)
    Acked-by: Viresh Kumar

    Rafael J. Wysocki
     

02 Apr, 2016

1 commit

  • 0bed612be   cpufreq: sched: Helpers to add and remove update_util hooks ... Browse Code »

    Replace the single helper for adding and removing cpufreq utilization
    update hooks, cpufreq_set_update_util_data(), with a pair of helpers,
    cpufreq_add_update_util_hook() and cpufreq_remove_update_util_hook(),
    and modify the users of cpufreq_set_update_util_data() accordingly.

    With the new helpers, the code using them doesn't need to worry
    about the internals of struct update_util_data and in particular
    it doesn't need to worry about populating the func field in it
    properly upfront.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Viresh Kumar
    Acked-by: Peter Zijlstra (Intel)

    Rafael J. Wysocki
     

11 Mar, 2016

1 commit

  • adaf9fcd1   cpufreq: Move scheduler-related code to the sched directory ... Browse Code »

    Create cpufreq.c under kernel/sched/ and move the cpufreq code
    related to the scheduler to that file and to sched.h.

    Redefine cpufreq_update_util() as a static inline function to avoid
    function calls at its call sites in the scheduler code (as suggested
    by Peter Zijlstra).

    Also move the definition of struct update_util_data and declaration
    of cpufreq_set_update_util_data() from include/linux/cpufreq.h to
    include/linux/sched.h.

    Signed-off-by: Rafael J. Wysocki
    Acked-by: Peter Zijlstra (Intel)

    Rafael J. Wysocki